Maeda MC285C-3 - Page 259

M A E D A Mini-Crawler Crane Section 5 – PERIODIC MAINTENANCE
1/2019 MC285C-3 5-43
4. Remove the hose (1) and elbow joint from the
return filter (3).
Fig. 5-73
5. Remove the mounting bolts (2) (4 bolts) and
lift the return filter to pull it out.
6. Apply liquid packing to the rubber plate (4),
mount a new hydraulic oil return filter and
securely tighten the mounting bolts (4 bolts).
7. Reinstall the hose and elbow joint removed in
step 4.
8. Remove the mounting bolts (6) (4 bolts) of the
filler cap (5) and remove the filler cap.
Fig. 5-74
9. Feed hydraulic oil through the filler port to the
level point (red dot) while looking at the oil
level gauge (7).
Fig. 5-75
10. After refilling the oil, set the filler cap and
tighten the mounting bolts (4 bolts) securely.
NOTE: Wipe away cleanly whenever the oil spills.
11. See “Installing Machinery Cover” on page
5-14 and install the machinery cover.
12. Bleed the air according to the following
sequence.
a. Start the engine only after piping and
hydraulic equipment are filled with the oil.
After engine start, continue to run the
engine at low idle for 10 minutes.
b. While keeping the engine speed low,
slightly operate each crane control lever to
operate each cylinder and winch motor
slowly.
Do not operate the boom hoisting cylinder
and telescopic boom cylinder to the stroke
end, but stop them at a position
approximately 100 mm before the stroke
end.
Repeat this 4 to 5 times.
c. Extend the outriggers and make the
outrigger cylinders telescope in the
condition that the machine does not float.
When making the outrigger cylinder
telescope, do not operate it to the stroke
end, but stop it at a position approximately
100 mm before the stroke end.
Repeat this 4 to 5 times.